Pressure washers spray concentrated water jets at buildings, pavement, and equipment to loosen and remove dirt, grime, and other deposits. These pressure cleaners, often known as power washers, reduce or eliminate the need to scour surfaces or apply cleaning products. Electric pressure washers plug into an electrical outlet and deliver steady power for longer periods of time with no odors and a quieter operation than gas pressure washers. Because gas pressure washers are fueled by gas, they don't have a power cord that restricts movement. Because cordless pressure washers are powered by batteries, they are as quiet as electric pressure washers and as mobile as gas pressure washers.